P/N 1392560
Type
Model M Functional Keypad
Nickname
M50
OEM
IBM, Lexmark
Switches
IBM membrane buckling springs
Earliest Appearance
1991
Original Keycaps
Transparent ABS
Casing Colour
White
Branding
IBM grey oval badge, IBM blue oval badge
Feet
Model M-style flip-out feet
Protocol
Set 2/AT
Connection
Cable
Cable
Grey coiled detachable SDL to PS/2
Key Count
50
Form Factor
50% matrix
Layout/Language
Relegendable
Data Last Updated
2021-01-19
More about this type of keyboard...
The 50-key Model M keyboards were designed for use with emulating IBM 4700 Finance Communication System applications on IBM Personal System/2 and later systems. As such, they possessed the same layout as the Model F-based IBM Model 100 keypads and came with either transparent keycaps or alphameric legends with a numeric keypad overlaying some of the keys via toggle. Technically speaking, these are the smallest Model Ms capable of featuring an alphanumeric layout and as such takes the form of a rough 50% ortholinear keyboard. The internal assembly also takes several production values from Model F designs with individual barrels, foam padding, and no plastic rivets holding the assembly together.